Burner support and burner for furnaces



' April 12, 1938.

D. VAN L Aw .2H3846 BURNER SUPPORT v yAND BURNER FOR FURNACES Filed Jan. 23, 1934 Z INVENTOR.

ATTORNEY.

establishments of. comparatively 'small size, The

the application of the burner-unitY in accordance with the present invention.

Patented Apr. 12, 1938 PATENT voFFlcE BURNER SUPPORT AND BURNER FOR i FURNACES Durbin Van Law, Denver, Colo., assignor to Powderco, Inc., Denver, Colo.

Y." Application January 23, 1934, Serial No. 707,909

6 Claims.

` This invention relates to retorts for furnaces, its primary-object being to provide apparatus for the `introduction and'ignition of powderedfuel, which as an entirety, canbe placed in operative relation to a furnace of .conventional construction, by insertion in the opening vthereof normally 4closed by the fire door. Y

.Anotherobject resides in providing in association with. apparatus of. the above stated charac- '10; ter, refractory means to concentrate and increase the. heat in the combustion: chamber of thefurnace, whereby. `to Obtain substantially complete.. combustion of the fuel stream at the maximumgtemperature.

A furtherobject of the invention is to provide in apparatus of the above described character means to effect turbulence of a stream of secondary air.,drawn. down intothe furnace; and still other objects arev to. be found in details of construction`- and novel and advantageous arrangements 'andcombinationsof parts, all of which will. be clearly broughtout inthe course of the followingdescription. y W Y Y Inithe.accompanyingdra g, in the several views ofwhich like parts are similarly designated,

Figure 14 is .an elevation. of a furnace, in connectionfwith a mill by, .which fuel-carrying aircurrents are directed'to a burner-unit which, in accordance'withthe present invention, is inserted intheiire-opening of the furnace, Y .flE'i'gurefZfis' an yenlarged vertical section ofthe furnace, inclusive. of the burner-unit, Y 1 VFigure. 3 is a face. view of the unit looking from within the furnace in the direction of the ar- Figure.,.4`is a'section along the line 4- 4 of Figure 2, v.

Figure 5 is a vertical. section of. the inner portionof the burner-uniudrawn to .an enlarged -scale on the line 5-"-5. of Fig. 3, and

`Figure is a sectio 1f1al plate of theunit by which secondary mittedto the .furnacei 'IheQiurnace as shownV at 4 is of the type commonlyfused' for, heating; rdwellings and@ other ew. of the apertured air is adfurnacehasyas usual,v an vasn-opening 5,*,ordirarily closed by a doorf, and a fire-opening 1.

The door which'finthejiordinary use of the furnace cl oses the nre-opening, is.v tale1f1 away for Ihe unit, asbest shown in Figure 5, comprises 'ajflanged box 8 whichfits'dnto the fire-opening of thefurnace; a' flangey y80a .at the outer end of the box engages the outer wall of the furnace, l

and thebox may be fastened in place by a rim of cement applied over the flange as shown at 9 in Figure 2 of the drawing. It is to be understood, however, Vthat other fastening ymeans, such as bolts, may be employedto hold the box in place.

The inner wall I0 of the box extends in a plane slanting with relation to the body portion of the box and facing downwardly in an inclined.

. Within the passage, preferably adjacent the end of .the conduit I6, is a whrler I8 adapted to impart a whirling. motion to the entering aircurrents. j

Embedded in the wall of the burner-block are two electrodes I9, the tips of which are spaced inside the flaring inner end portion of the pasfsage to provide a spark-gap 20 by which in the operation, the fuel carried by the air-currents is initially ignited. The electrodes .are connected `in circuit witha source of electric current as in-A dicated .at 2I in Figure 1.

Around the portion of the burner-block projecting through the central opening of the end plate IIJ of the box 8 is a circumferentially central opening throughwhich the end. of the burner-block projects, and it has around this opening a circular series of slanting vanes 24 formed by .cutting U-shaped slits in the metal of which the plate is composed and bending the stripswithin the slits outwardly as best shown in Figure 6. Theouter surface of the plata' around the series of vanes, is preferably covered with a layer 25 of refractory clay or other sirnilar'm al terial. The vanes 24' function as va whirler-element to impart a whirling motion to the second.4

aryairecurrents vas they enter the combustion chamber ofthe furnace. It will be seen that owing to the Aslanting position of the end4 plate Il)A of the box 8, the axis of the passage l5 in the burner-block I4 extends slantingly with relation to the vertical axis of the combustion chamber 26 of the furnace, so that the fuel-carrying aircurrents enter the furnace through the passage of the burner-block in a downwardly inclined stream.

Opposite to the end plate of the box 8 is a baffle plate 2 of refractory material whose principal function is to reect the heat into the coal stream.

The refractory coating 25 of the plate 22 has a similar effect.

In the operation of the furnace both the bale and the coating are heated, and the radiant heat being reflected into the fuel stream produces a high temperature with a correspondingly high degree of combustion. The whirling motion imparted to both the fuel-carrying air-currents and the secondary air by the two whirler elements produces dissemination of the fuel inside the combustion chamber, which exposes each particle thereof to the heat after initial ignition as it passes the spark-gap 20.

The secondary air within the chamber 23, moreover, has a cooling effect to prevent the metal parts from being detrimentally affected by the heat of the furnace. Y, 4

The downward direction of the fuel stream as it enters the furnace gives to the fuel the benefit of the entire extent of the combustion chamber. The fuel in this manner is fed against a relatively still body of air in the lower portion of the chamber, causing the flames tospread across the chamber. The result of this spreading effect and the reflective properties of the baiiie and the coating of the plate 22 is the production and maintenance of a radiant heat of high temperature resulting in rapid and substantially complete combustion.

It is a Idistinctive feature of the invention that the-unit, mounted and assembled as an entirety, is readily slipped into the fire-opening after the door thereof has been removed, and is then fastened in place. The application of the device therefore requires no alteration in the construction of the furnace whatsoever, with the possible exception of the provision of the slanting baffle plate 21, which, as, shownV in the drawing, extends to the floor of the furnace and Yterminates at a distance from the ash-opening so as not to interfere with the removal of the ashes.

It is to be understood that in using the term furnace in the foregoing description and the hereunto appended claims are included not only heating devices, such as are used in residences and other similar establishments, but also small boilers and other devices used for other than heating purposes. Y

What I claim and desire to secure by Letters Patent is: Y f

1. The combination with a furnace having a combustion chamberand a fire-opening for the supply of fuel to the chamber, of a burner-unit comprising a box in the fire-opening, open at its outer end and having an inner end wall slantingly facing downwardly and located in the combustion chambentheinner end wall having an f aperture for a burner-block and an aperture for the admission ofsecondary air to the combustion chamber, a burner-block in the firstmentioned aperture having a passage substantially perpendicular to the end wall for the entry of downwardly directed fuel-carrying air-currents into the combustion chamber, and a refractory plate located in the combustion chamber in the path of the fuel stream.

2. The combination with a furnace having a combustion chamber `and a fire-opening for the supply of fuel to the chamber, of a burner-unit comprising a box in the fire-opening, open at its outer end and having an inner end wall slantingly facing downwardly and located in the combustion chamber, the end wall having an aperture for a burner-block and an aperture for the admission of secondary air to the combustion chamber, a burner-block in the rst-mentioned aperture having a passage substantially perpendicular to the end wall for the entry of downwardly directed fuel-carrying air-currents into the combustion chamber, and a plate spaced from the end wall to provide a chamber to receive the secondary air, said plate having an opening through which the burner block extends, and openings. surrounding the burner block.

3. 'Ihe combination with arfurnace having ay combustion chamber and Va fire-opening for the supply of fuel to the chamber, of a burner-unit comprising a box in the nre-opening, open at its outer end and rhaving an inner end wall slantingly facing downwardly and located in the combustion chambenthe inner end wall having an aperture for a burner-block and an aperture for the admissionof secondary air to the combustion chamber, a burner-block in the first-mentioned aperture having a passage for the entry of downwardly directed fuel-carrying air-currents into the combustion chamber, and a plate I spaced from the en-d wall to provide a chamber to receive the secondary air, said plate having an opening through which the burner block projects and openings having slanting vanes for causingvturbulence of the secondary air uponfits entering the combustion chamber.

.4. VThe combination with a furnace having a combustion chamber and a fire-opening for the supply of fuel to the chamber, of a burner-unit comprising a box in the lire-opening, open at its outer end and having an inner end Wall slantingly facing downwardly and located in the combustion chamber, the inner end wall having an aperture for a burner-block and an aperture for the admission of secondary air to the combustion chamber, a burner-block in the Vfirst-mentioned aperture having a passage for the entry of downwardly directed fuel-carrying air-currents into the combustion chamber, a plate spaced from the end wall to provide a chamber to receive the secondary air, said plate having an opening through which the burner block projects and a coating of refractory material upon the outer surface of the plate.

5. The combination with. a furnace having a combustion chamber and a fire-opening for the supply of fuel to the chamber, of a burner-unit comprising abox in the fire-opening, open at its outer end and having an innerrend wall slantingly facing downwardly and located in the combustion chamber, the inner endwall having an aperture for a burner-block and an aperture for the admission of secondary air to the combustion chamber, a burner-block in the first-mentioned aperture having a passage for the entry of downwardly directed fuel-carrying air-currents into to said coating and in the path of the fuel stream.

6. A burner unit for use with a furnace having a fire-opening, comprising a box-like member, for insertion into the opening, open at its outer end and having an inner Wall which siantingly Yfaces downwardly when it is in position, the inner wall being provi-ded with an opening, a fuel nozzIe comprising a burner-block projecting thru the opening, the inner wall being also provided with 

